Lighting unit



C. A. B. HALVORSON, JR. LIGHTING UNIT.

APPLICATION FILED MAH, I2. 1921.

Patented Dec. 20, 1921.

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1)"5. di JR., 0F LYNN, EMSSCHUSETTS, ASSIGNOR T0 GENERAL ELECTRIC COAINY, A. CRl-ORATION OF NEW YORK.

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Specification of Letters Patent. *Parigndl Digg, 2U, 11921,

Application filed March 12, 1921. Serial Efo. 451,665.

T o all who/m. t may concern-.' y

Be it known thatl, CnoMwnLL A. B. HAL- voRsoN, Jr., a citizen of the United States, residing at Lynn, in the county of Essex, State of Massachusetts, have invented'cer tain new and useful Improvements in Lighting Units, of which the following is a specification.

My invention has reference to lighting units. More specifically it relates to units for street and other outdoor illumination in which case a wide downward spread of light is desired. i

An object of my invention is to provide a simple and efficient lighting unit of this character in which a single member forms a high voltage insulator, a lamp housing and support, and a reflector, thereby el1minating numerous elementsheretofore employed. and greatly simplifying its construetion.

Another object of my invention. is to provide a rugged lighting unit,4w h1ch is notl easily broken, nor subject to wmdage, and which may withstand the elements.

Mv invention will be better understood froni the following description taken in connection with the accompanying drawings and its scope will bepointed out in the appended claims.

ln the accompanying drawings, Figure 1 is a perspective View of one type of lamp unit embodying my invention; ll ig. 2 is a central vertical sectional view of the same unit; and Fig. 3 is a modified detail of Fig. 2.

Referring to the drawings, in which the numeral 1 indicates a body of insulating material, preferably porcelain, which is especially desirable' on account of its non flexible and weather-proof qualities. This body is substantially a bell-shaped strueture, havin a central chamber 2, which diminishes 1n size in the neck 3 of the body. rlihe neck 3 is formed with an internal annular dange t integral with the body 1. which supports electrical termmals 5, 5, of suitable conducting material. These terminals are secured to the Harige l by screws 6, 6. Contact blades i', are in electrical Aengagenaent with the terminals 5,- 5, andv are bent upwardly over the dange 4l. These blades are normally urged inwardly by springs 8, 8. rilhe pair of blades l, pand springs 8, 8, extend between the terminals '5, 5, and the flange 4, andare also Secured `preferably provided with tie ears 13, 13

integral therewith for the conductors 10, 10.` ln another form of my invention the openings 9 may be placed near the flange 4 and the terminals 5 may be prolonged to extend through the openings so that the conductors may be secured externallyy of the body 10, as shown in Fig. 3.

iii light source 1l, which may be any suitable type of incandescent lamp, is supported in a socket 15 having spring terminals 16, 16, arranged to coact with the Contact blades 7, 7, in a manner readily understood. ln one type of unit embodying my invention. a

portion of the inner surface of the chamber 2, for example, the surface below the socket 15, indicated by the line 1T iS preferably glazed and therefore reflecting. lt may also be of suitable curvature to direct reflected rays in a general downward and moderate lateral direction. dit its lower edge, that portion of the body 1 forming a wall around the chamber 2 gradually thickens and eX- tends outwardly rather abruptly, as shown in the drawings. rl`he lower surface of this wall, which is the edge of the bell. is formed with a number of radially waved reflecting surfaces 18, substantiallyv perpendicular to the axis of the body 1 and concentric with the chamber 2. These reflecting surfaces are located slightly above the light source, which l have indicated as a point source at- 19, for purposes of illustration. ln accordance with well-known laws of reflection, rays of light striking the surface 1S, are given a wide lateral spread in a general downward direction.

The complete unit thus described is supported by a suitable hood 20, which may be of cast iron, to which it is secured by screws A 21. The upper portion of the hood is formed my invention thereto, since various modifications thereof will suggest themselves to those skilled in the art without departing from the spirit of my invention, the scope of which is Set forth in the annexed claims. What I claim as new and desire to secure by Letters Patent of the United States, is

1. A light fixture comprising a light source, a body of insulating material formed with a bell shaped, lopen mouthed central chamber in which the light source is located, and a reflecting surface formed on said body at the edge of said chamber and located slightly above the light source whereby the rays reflected receive a Wide downward spread. 2. A light fixture comprising a light source, a body of insulating material formed with a bell shaped, open mouthed central chamber in which the light source is located, and a reflecting surface, having radial waves, formed on said body at the edge of said chamber, extending laterally substantially perpendicular to the axis of said body and located slightly above the light source whereby the rays reflected by the waves receive a wide downward spread.

3. A light fixture comprising a light source, a body of insulating material formed with a central chamber in which the light source is located, and a reflecting surface formed on said body at the edge of said chamber, electric terminals carried by said body, and a removable socket for supporting the slight source slightly below said reflecting surface.

4. A light fixture comprising a light source, a body of insulating material formed with a bell shaped, open mouthed central chamber having a downwardly reflecting inner surface in which the light source is located, and a reflecting surface having radial waves formed on said body at the edge of said chamber extending laterally substantially perpendicular to the axis of said body and located slightly above the light source, whereby the rays reflected by the waves receive a wide downward spread.

5. A light fixture comprising a light source, a body of insulating material formed with a laterally Vand downwardly reflecting surface, and with a central chamber having a downwardly reflecting inner surface, said chamber housing the light source, electric terminals within said body, electric conductors to said terminals extending through openings in the wall of said body, and a removable socket for the light source for connection with the terminals.

6. A light fixture comprising a body of insulating material having a central chamber with a downwardly reflecting inner surface,

la radially waved reflector on its lower edge concentric with said chamber, electric terminals within the chamber, electric conductors extending through the wall of the chamber to said terminals, tie ears for the conductors integral with said body, a source of light and a socket supporting the same adapted to be inserted within and removed from chamber with the light source slightly below the radially waved reflecting surface.

In witness whereof, I Vhave hereunto set my hand this 9th day of March, 1921.

oRoMwELL A. B. HALvoRsoN, JR. 

